It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him), he says: We descended with the Noble Prophet (peace and blessings be upon him) in a valley, which was called the valley of Khumm. Then the Prophet (peace and blessings be upon him) ordered for prayer and led us in the Zuhr prayer in the intense heat. Then the Prophet (peace and blessings be upon him) delivered a sermon to us, and to protect him from the sun, a cloth was placed over an acacia tree to provide shade for him. The Prophet (peace and blessings be upon him) said: Do you not know, or do you not bear witness, that I am closer to every believer than his own self? The companions said: Yes, indeed. Then the Prophet (peace and blessings be upon him) said: Whomever I am a friend to, Ali is also his friend. O Allah! Show enmity to the one who shows enmity to Ali, and befriend the one who befriends Ali.